Arnd Bergmann began his 2025 Linux
Plumbers Conference session on the future of 32-bit support in the
Linux kernel by saying that it was to be a followup to his September talk on the same topic. The
focus this time, though, was on the kernel's "high memory" abstraction, and when it could be removed. It seems that the kernel community will need to support 32-bit systems for some time yet, even if it might be possible to remove some functionality, including support for large amounts of memory on those systems, more quickly.
https://lwn.net/Articles/1051010/
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